Date: Mon, 18 Aug 2014 17:17:53 +0200 From: "Ronald Klop" <ronald-lists@klop.ws> To: freebsd-fs@freebsd.org Subject: Re: Strange effect of zfs rename Message-ID: <op.xksnf3hkkndu52@ronaldradial.radialsg.local> In-Reply-To: <53E61706.4010604@digiware.nl> References: <53E61706.4010604@digiware.nl>
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On Sat, 09 Aug 2014 14:41:42 +0200, Willem Jan Withagen <wjw@digiware.nl> wrote: > Hoi, > > In the process of creating backups I have this sequence of: > > /sbin/zfs destroy zfsraid/backups@Saturday-2 > /sbin/zfs rename -f zfsraid/backups@Saturday zfsraid/backups@Saturday-2 > /sbin/zfs snapshot zfsraid/backups@Saturday > > But then I end up with: > # cd /backups/.zfs/snapshot > # ll > ls: Saturday-2: Device busy > total 116 > 0 dr-xr-xr-x 11 root wheel 11 Aug 9 14:15 ./ > 0 dr-xr-xr-x 4 root wheel 4 Jul 30 22:07 ../ > 17 drwxr-xr-x 13 root wheel 16 Jul 31 09:54 20140801/ > 17 drwxr-xr-x 18 root wheel 21 Aug 5 01:03 Friday/ > 17 drwxr-xr-x 16 root wheel 19 Aug 3 01:03 Monday/ > 17 drwxr-xr-x 15 root wheel 18 Aug 2 01:03 Sunday/ > 17 drwxr-xr-x 18 root wheel 21 Aug 5 01:03 Thursday/ > 17 drwxr-xr-x 17 root wheel 20 Aug 4 01:03 Tuesday/ > 17 drwxr-xr-x 18 root wheel 21 Aug 5 01:03 Wednesday/ > Exit 1 > > And the device does not becomen not-busy even after a "long" wait. > > The way to remedy this is: > /sbin/zfs unmount -f zfsraid/backups > /sbin/zfs mount zfsraid/backups > > After that the snapshot-dir is as it should. > > I'm running: > FreeBSD zfs.digiware.nl 9.3-STABLE FreeBSD 9.3-STABLE #272 r269145M: Sun > Jul 27 06:50:06 CEST 2014 > root@zfs.digiware.nl:/usr/obj/usr/srcs/src9/src/sys/ZFS amd64 > > Can other reproduce this? Or is my system suffering from bitrot? > > Regards, > --WjW I don't see this. I used to work on 9-STABLE and now on 10-STABLE (from august 5th). I use zfs rename a lot for handling my snapshots, but I do not use the -f option. I must say I never need to go into the .zfs/snapshot directories, so they are mounted seldom. I just went into them today for a test, but I don't have 'Device busy' problems. Do you keep such a directory active somewhere? Ronald.
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